Malicious PDF — malware analysis report

Static analysis result for SHA-256 178ddf2a6548e956…

MALICIOUS

PDF

93.2 KB Created: 2021-07-06 19:51:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f9e76c9a63d2cb0ed6d2f9afeceb2422 SHA-1: 5c0de390c07f067a584a344b76c0c89c2794ff28 SHA-256: 178ddf2a6548e956d9d76d703c917d530a03eb4bd29a1eef1265290e3df796d1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The document contains numerous links pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the presence of external URIs and link farms strongly suggests the PDF's purpose is to facilitate access to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://laborke.ru/uplcv?utm_term=creation+of+the+world+in+genesis PDF link annotation
    • http://goneviaggi.com/themes/userfiles//files/vewezikovunixulo.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/vqheildjjv4r2sghv7qp8sisth/35203524515.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc3f0748d4---sasunanukaxu.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/13364408054.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/sabimu.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/a20jh5r52pjuvq2spmlpenlcm8/vagiketesesejelinojofoni.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/6ef04868071fdd294efd1a7de95d4a99/24764543041.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/8f95f0ad9a2b0774d9b66fb5c761dda3/jorilesadexuxunovifonive.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606c791969ff5---fukujoxepore.pdfIn PDF document text
    • http://rhodeislandalpha.com/clients/56223/File/24721973332.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609418914b02c---nijazu.pdfIn PDF document text
    • http://aa-nusd.jp/pavukuku.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/a533cc95a1e34fc537af63a06d41e9fa/45357727316.pdfIn PDF document text
    • http://stevis.cz/files/file/81120564635.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/77d314edcc1065f4d08d8918c0d36bc1/zutagomokodizawadud.pdfIn PDF document text
    • http://kpnamboodiris.com/userfiles/file/17838204287.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d8fbf78f9e6---xuwuvijosapi.pdfIn PDF document text
    • http://pomodorolennep.de/gfx/userfiles/files/lakaju.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5689314960---23896183325.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a7965190f---68681949569.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/92056926213.pdfIn PDF document text
    • https://comobrew.com/newsite/images/user_uploads/file/99324126109.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001089b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089B 17160 bytes
SHA-256: 9c93b60412f5102afe1a0a5abdbe80e2f2d6f8833062479d3f1daa8393a6d132
font_01_sfnt_off00013547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13547 10748 bytes
SHA-256: 259f884cac247f99da55206207985f03a70f5b190e884aed784e7e2a5494b6c9
font_02_sfnt_off00014dcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DCB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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